{"instruction": "You are an expert in relationship extraction. Please extract relationship triples that match the schema definition from the input. Return an empty list for relationships that do not exist. Please respond in the format of a JSON string.", "schema": ["cause effect", "message topic", "member collection", "else"], "input": "many simple dc power supplies regulate the voltage using a shunt regulator such as a zener diode ."}
{"cause effect": [], "message topic": [], "member collection": [], "else": []}